Schneider Electric VW3 A3 303 用户手册
34
8. 11. Communication scanner
The communication scanner can be used to enhance application performance. The drive automatically copies non-contiguous parameters
to an input table and an output table. Thus, the copy of several non-contiguous parameters can be read or written in a single request (an
operation which would normally have required several Modbus requests).
to an input table and an output table. Thus, the copy of several non-contiguous parameters can be read or written in a single request (an
operation which would normally have required several Modbus requests).
The input table and the output table each contain 8 variables.
The values of these communication scanner variables can be displayed on the graphic display terminal using the
[1.2-MONITORING]
menu,
[COMMUNICATION MAP]
(
CMM)
submenu (see section "7. Diagnostics - 7.4 Communication scanner").
These parameters can be accessed via all the read and write requests supported by the drive.
There is a marked improvement in performance for the following functions:
There is a marked improvement in performance for the following functions:
Output variables
Logic address
Default assignment
[Com Scan Out1 val.]
(
nC1)
12 761 = 16#31D9
Control word (CMd)
[Com Scan Out2 val.]
(
nC2)
12 762 = 16#31DA
Speed reference (LFrd)
[Com Scan Out3 val.]
(
nC3)
12 763 = 16#31DB
Not used
[Com Scan Out4 val.]
(
nC4)
12 764 = 16#31DC
Not used
[Com Scan Out5 val.]
(
nC5)
12 765 = 16#31DD
Not used
[Com Scan Out6 val.]
(
nC6)
12 766 = 16#31DE
Not used
[Com Scan Out7 val.]
(
nC7)
12 767 = 16#31DF
Not used
[Com Scan Out8 val.]
(
nC8)
12 768 = 16#31E0
Not used
Input variables
Logic address
Default assignment
[Com Scan In1 val.]
(
nM1)
12 741 = 16#31C5
Status word (EtA)
[Com Scan In2 val.]
(
nM2)
12 742 = 16#31C6
Output speed (rFrd)
[Com Scan In3 val.]
(
nM3)
12 743 = 16#31C7
Not used
[Com Scan In4 val.]
(
nM4)
12 744 = 16#31C8
Not used
[Com Scan In5 val.]
(
nM5)
12 745 = 16#31C9
Not used
[Com Scan In6 val.]
(
nM6)
12 746 = 16#31CA
Not used
[Com Scan In7 val.]
(
nM7)
12 747 = 16#31CB
Not used
[Com Scan In8 val.]
(
nM8)
12 748 = 16#31CC
Not used
Code
Modbus name
Description
Size of data
3 = 16#03
Read Holding Registers
Read N output words
63 words, max.
4 = 16#04
Read Input Registers
Read N input words
63 words, max.
16 = 16#10
Write Multiple Registers
Write N output words
61 words, max.
23 = 16#17
Read/Write Multiple Registers
Read/write N words
20/20 words max.
43 = 16#2B
Read Device Identification
Identification